As far as most British travelers are concerned, low-fare airlines are interchangeable. EasyJet, Ryanair, Go, Buzz ... they all can get you to Europe's beaches or ski slopes for about the price of a train ticket to Skegness. And they all make air travel as glamorous as a ride on a Routemaster bus. Brand loyalty is unheard of. So what to make of the revelation last week that Stelios Haji-Ioannou's easyJet is in talks to buy Go and maybe British Airway's loss-making German subsidiary to boot? In a stroke, easyJet is poised to pull ahead of Ryanair to become Europe's largest...